In 1905, while studying the gametes of the beetle Tenebrio molitor (Figure 2), Stevens noted an unusual-looking pair of chromosomes that separated to form sperm cells in the male beetles.

Enlarging the focus to include organisms with novel meiotic formats would help to build a holistic view of not only pairing and HR events but also how these processes relate to chromosome ...

In particular, it explains that humans have one fewer chromosome pair in their cells than apes, due to a mutation found in chromosome number 2 that caused two chromosomes to fuse into one.

among which the sex chromosomes constitute one pair. The X chromosome, comprising roughly 155 million DNA base pairs, makes ...

but there are strange cases in which chromosomes either have multiple pairing partners or have no partner. The ways in which these strange chromosomes successfully segregate when surrounded by a large ...

Every person, male or female, has 22 matching pairs of chromosome—one inherited from each parent—but the 23rd pair is different. This unmatched pair, known as the X and Y sex chromosomes ...

The biological sex of a human being is determined by which chromosomes make up that baby's genetic material. Females usually have two X chromosomes, while males tend to have one X and one Y ...

These can be arranged into 23 pairs. Each chromosome in a pair carries the same types of genes. The 23rd pair are the sex chromosomes: In females, the two chromosomes are identical in shape.

Interlinking bases hold the two sides together. As A is complementary to T and C is complementary to G they pair up. This is known as the base-pairing rule. A nucleotide consists of 1 phosphate ...